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Vedmedyk [2.9K]
3 years ago
11

A runner exerts a force of 234 N against the ground while using 1100 W of power.How long does it take them to run a distance of

30.0 m
Physics
1 answer:
11Alexandr11 [23.1K]3 years ago
8 0
<h3>Answer:</h3>

6.38 seconds

<h3>Explanation:</h3>

We are given;

  • The force exerted by the runner as 234 N
  • Power used = 1100 W
  • Distance as 30.0 m

We are required to determine the time taken to run the distance;

  • We know that power is the rate of work done

That is;

Power = work done ÷ time

But, work done = Force × distance

Therefore;

Work done = 234 N × 30 m

                   = 7020 Joules

Therefore, from the formula, Power = work done ÷ time

Time = Work done ÷ power

Thus;

Time = 7020 J ÷ 1100 W

       = 6.38 seconds

Hence, the time taken is 6.38 seconds

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Answer:

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Explanation:

Let the speed of the Boeing 747 be x miles per hour.

The small airplane covers distance of 780 miles with speed 260 miles per hour.

Also,

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